Overview

overview

10

Static

static

8b0a5fb133...7d.exe

windows7_x64

10

8b0a5fb133...7d.exe

windows10-2004_x64

7

Analysis

  • max time kernel
    161s
  • max time network
    32s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 04:49

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General

  • Target

    8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d.exe

  • Size

    170KB

  • MD5

    31bd0f224e7e74eee2847f43aae23974

  • SHA1

    92e331e1e8ad30538f38dd7ba31386afafa14a58

  • SHA256

    8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d

  • SHA512

    a13f05a12b084ef425f542ff4be824bbccb5dbdfe085af8b7e19d81a6bcba4b8c1debcc38f6b57bc9265a4db21eed70852ece8cc62b3ef14c47fca3035a55249

Score
10/10
ryukpersistenceransomware

Malware Config

Extracted

Path

C:\RyukReadMe.txt

Family

ryuk

Ransom Note
Your network has been penetrated. All files on each host in the network have been encrypted with a strong algorithm. Backups were either encrypted or deleted or backup disks were formatted. Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover. We exclusively have decryption software for your situation No decryption software is available in the public. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT RENAME OR MOVE the encrypted and readme files. DO NOT DELETE readme files. This may lead to the impossibility of recovery of the certain files. To get info (decrypt your files) contact us at [email protected] or [email protected] BTC wallet: 14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk Ryuk No system is safe
Wallets

14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\system32\taskhost.exe
    "taskhost.exe"
    1⤵
    • Drops file in Program Files directory
    PID:1224
  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1320
    • C:\Users\Admin\AppData\Local\Temp\8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d.exe
      "C:\Users\Admin\AppData\Local\Temp\8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1636
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1312
        • C:\Windows\system32\reg.exe
          REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d.exe" /f
          3⤵
          • Adds Run key to start application
          PID:668

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/1224-56-0x000000013F6B0000-0x000000013FA3E000-memory.dmp

      Filesize

      3.6MB

      Download

    • memory/1224-57-0x000000013F6B0000-0x000000013FA3E000-memory.dmp

      Filesize

      3.6MB

      Download

    • memory/1320-60-0x000000013F6B0000-0x000000013FA3E000-memory.dmp

      Filesize

      3.6MB

      Download

    • memory/1636-55-0x000007FEFC2D1000-0x000007FEFC2D3000-memory.dmp

      Filesize

      8KB

      Download